Imperforate bowl: centrifugal separators – Rotatable bowl – Including driven material-moving means therein
Reexamination Certificate
2007-08-28
2007-08-28
Cooley, Charles E. (Department: 1723)
Imperforate bowl: centrifugal separators
Rotatable bowl
Including driven material-moving means therein
C494S056000, C494S065000, C210S376000
Reexamination Certificate
active
10973949
ABSTRACT:
A centrifugal separator includes a cylindrical bowl having a conical lower end with an opening through which feed liquid is injected during a feed mode of operation. The feed liquid is separated into centrate and solids, which accumulate along the inner surface of the bowl. A piston assembly includes a conical piston disposed within the cylindrical bowl, coupled to a piston actuator by a two-part piston shaft. During the feed mode of operation, the piston shaft is disconnected, and the piston is held in an uppermost position by hydraulic pressure from the feed liquid as the bowl is rotated, and a centrate valve on the piston is opened to permit the centrate to flow out to a centrate discharge port. After solids are separated and accumulated on an interior surface of the bowl, the rotation of the bowl is stopped and residual centrate is drained therefrom. In a solids discharge and pumping mode of operation, the piston shaft is connected and the piston actuator urges the piston axially downward, closing the centrate valve and forcing the accumulated solids from the bowl via the opening in the conical lower end of the bowl and into a passage leading to a solids outlet port.
REFERENCES:
patent: 1909188 (1933-05-01), Roberts
patent: 2040351 (1936-05-01), Williams
patent: 2094058 (1937-09-01), Bryson
patent: 2790309 (1957-04-01), Wenzelberger
patent: 3306681 (1967-02-01), Barringer
patent: 3403848 (1968-10-01), Windsor et al.
patent: 3539096 (1970-11-01), Lewis et al.
patent: 3741465 (1973-06-01), Lincoln
patent: 3770191 (1973-11-01), Blum
patent: 3972514 (1976-08-01), Voitsekhovsky et al.
patent: 4155503 (1979-05-01), Sears
patent: 4513566 (1979-05-01), Ryer et al.
patent: 4416655 (1983-11-01), Bennett
patent: 4493768 (1985-01-01), Kubr et al.
patent: 4493769 (1985-01-01), Paschedag et al.
patent: 4687463 (1987-08-01), Simonnet
patent: 4692247 (1987-09-01), Orlans
patent: 4875334 (1989-10-01), Rajsigl et al.
patent: 5250180 (1993-10-01), Chang
patent: 5328441 (1994-07-01), Carr
patent: 5356367 (1994-10-01), Carr
patent: 5425698 (1995-06-01), Carr
patent: 5454777 (1995-10-01), Ziems et al.
patent: 5674174 (1997-10-01), Carr
patent: 5733238 (1998-03-01), Carr
patent: 5743840 (1998-04-01), Carr
patent: 5879279 (1999-03-01), Berger et al.
patent: 5916082 (1999-06-01), Opfer
patent: 6126587 (2000-10-01), Berger et al.
patent: 6149573 (2000-11-01), Berger et al.
patent: 6224532 (2001-05-01), Beattey
patent: 6248054 (2001-06-01), Berger et al.
patent: 6251056 (2001-06-01), Berger et al.
patent: 6461286 (2002-10-01), Beattey
patent: 6478724 (2002-11-01), Beattey
patent: 6632166 (2003-10-01), Carr
patent: 6776752 (2004-08-01), Carr
patent: 6932757 (2005-08-01), Beattey
patent: 6986734 (2006-01-01), Carr
patent: 7052451 (2006-05-01), Carr
patent: 2002/0016243 (2002-02-01), Carr
patent: 2003/0017931 (2003-01-01), Beattey
patent: 2003/0195105 (2003-10-01), Carr
patent: 2005/0003945 (2005-01-01), Beattey
patent: 2005/0009681 (2005-01-01), Carr
patent: 2005/0043164 (2005-02-01), Opfer
patent: 2005/0233882 (2005-10-01), Carr
patent: 2005/0233883 (2005-10-01), Carr
patent: 2007/0049479 (2007-03-01), Carr
patent: 604 906 (1978-09-01), None
patent: 4002073 (1991-05-01), None
patent: 0947252 (1999-10-01), None
patent: 63171656 (1988-07-01), None
patent: 64-70157 (1989-03-01), None
patent: 71444150 (1995-06-01), None
patent: 8131894 (1996-05-01), None
patent: 8266936 (1996-10-01), None
patent: 985129 (1997-09-01), None
patent: 2001-140704 (2000-05-01), None
patent: 2003-144973 (2005-05-01), None
patent: WO 00/38762 (2000-07-01), None
patent: 2006/046141 (2006-05-01), None
Carr Powerfuge Brochure, Carr Separations, Inc., undated, p. 1-4.
Alfa-Laval CHPX Centrifuge Brochure, Alfa Laval, Inc., undated, p. 1.
Shanghai Centrifuge Institute, SCI Tube Bowl Centrifuge, Shanghai, China, undated, p. 1-2.
Cooley Charles E.
Wagner Development Inc.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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